No.
No, they are not relatively prime.
That's an infinite list that includes 30, 42 and 66.
30, 42, 66, 70, 78
30, 42, 66, 70, 78
30, 42, 66, 70, 78
30, 42, 66, 70 and 78.
30, 42, 66, 70 and 78.
30, 42, 66, 70, 78
They are 30, 42, 63, 66, 70 and 78.
How about the prime numbers of: 47+19 = 66
30, 42, 66, 70 and 78.
30, 42, 66, 78